Your Finances, Simplified

Every financial decision starts with a number. How much tax comes out of your paycheck. What your home equity is actually worth. Whether that salary offer is competitive for your state.

Kalkfy exists to get you those numbers in seconds, not hours. Free, private, and built on the same data sources that CPAs and financial planners use.

What We Build

Kalkfy is an independent financial tools platform. We design and maintain calculators across four categories:

  • Paycheck and tax : Federal and state withholding, take-home pay by pay period, effective tax rates across all 50 states
  • Work and pay : Overtime calculations, hourly-to-salary conversions, pay raise impact analysis
  • Salary research : Median compensation by profession and state, experience-level breakdowns using BLS occupational data
  • Financial planning : HELOC estimates, compound interest projections, debt payoff strategies, retirement savings modeling

Each tool runs entirely in your browser. Your inputs stay on your device. Nothing is transmitted, stored, or shared.

Where the Data Comes From

Financial calculators are only as good as their source data. Ours comes from three agencies:

Internal Revenue Service (IRS) : Federal tax brackets, standard deduction amounts, withholding tables, FICA contribution rates. We update these figures each January when the IRS publishes its annual inflation adjustments.

Bureau of Labor Statistics (BLS) : Occupational Employment and Wage Statistics program. Median salaries, percentile breakdowns, and state-level compensation data for over 800 occupations. Latest release: May 2024 estimates.

Social Security Administration (SSA) : Contribution rates, wage base limits, benefit formulas. The 2026 Social Security wage cap is $176,100; Medicare has no cap.

When these agencies publish updated figures, we update our calculators. The current data refresh cycle: March 2026.

How the Calculators Work

Every calculator on Kalkfy uses standard financial mathematics. Federal tax uses marginal bracket calculations. Loan payments use the standard amortization formula. Salary data maps directly to BLS percentile tables.

We verify outputs against IRS worksheets, published amortization schedules, and government benefit calculators. If our number differs from the official source, we fix ours.

No proprietary algorithms. No “estimated” figures pulled from undisclosed models. The formula is documented on each calculator page so you can check the math yourself.

What Kalkfy Is Not

We are not a bank, brokerage, tax preparation service, or financial advisory firm. We do not hold deposits, process transactions, manage portfolios, or file returns.

No one at Kalkfy is providing personalized financial, tax, or legal advice. The calculators produce estimates based on the data you enter and the publicly available figures we reference. For decisions with real financial consequences, work with a licensed CPA, tax attorney, or certified financial planner.

Editorial Standards

  • Every data point links to its government source
  • All formulas use standard financial mathematics, documented on each page
  • Results carry disclaimers noting they are estimates
  • Content is reviewed when source agencies publish updated figures
  • No sponsored content influences calculator results
  • No affiliate relationship changes how a calculator computes its output

Why This Exists

Running a basic tax estimate should not require expensive software, a professional consultation, or surrendering your personal data to a third-party platform.

Kalkfy is the answer to a simple question: what if financial calculators were built for the person using them, not for the company selling something on the other side?

Contact

Found an error in a calculation? Have a suggestion for a new tool? Reach us through our contact page. We read every message.

If you are a licensed financial professional interested in reviewing our formulas or contributing expertise, reach out through our contact page.